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Retirement Savings Plan	3 Months Ended
Retirement Savings Plan	Mar. 31, 2018
Postemployment Benefits [Abstract]
RETIREMENT SAVINGS PLAN	RETIREMENT SAVINGS PLAN The Company has a 401(k) retirement savings plan that covers all eligible U.S. employees. Eligible employees may elect to contribute up to 75% of base salary, subject to ERISA limitations. The Company generally makes matching contributions equal to the employee’s contribution up to 4% of the employee’s salary. The Company may also provide an additional contribution based on an eligible employee’s salary. Total plan expenses recognized for the three months ended March 31, 2018 and 2017 were $1.2 million and $2.1 million. In addition, the Company has a deferred compensation plan for employees whose benefits under the 401(k) plan are limited by federal regulations.